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Finding the Fourth Proportional to 669.33, 1,004.15 and 376.70

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Solution

The fourth proportional to 669.33, 1,004.15 and 376.70 is: 565.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.33 : 1,004.15 = 376.70 : x
  2. Step 2: Convert to fraction form
    669.33/1,004.15 = 376.70/x
  3. Step 3: Cross multiply
    669.33x = 1,004.15 × 376.70
  4. Step 4: Simplify right side
    669.33x = 378,259.23
  5. Step 5: Solve for x
    x = 378,259.23/669.33
  6. Step 6: Final answer
    x = 565.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.